Re-enable link-time code generation for WebKit in Chrome builds temporarily.
Re-enable link-time code generation for WebKit in Chrome builds temporarily.

Turning it off introduced too much of a performance regression. We think we
can squeak by enough to get a canary to build for the branch point, and then
we'll probably have to turn it off again.

R=scottmg@chromium.org
BUG=236217

This reverts commit adacea33d1a43305f2e900d6a017c8720351e252.

Review URL: https://codereview.chromium.org/14959002

git-svn-id: bf5cd6ccde378db821296732a091cfbcf5285fbd@149670 bbb929c8-8fbe-4397-9dbb-9b2b20218538

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